Ball-grinding machine.



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1,05 1,885. Patented Feb. 4, 1913.

l l I nnr sn is ii FFKQ I EWALB HIiNUS, 61'! TEGEL, NEAR BERLKN, GERMANY, ASSIGNOB TU DEUTSCHE HAFFEL P & MUNITIGNSFABBIKEN, GE BERLIN, GERMANY BALLGRINDING MACHIIIE.

nppiicezion files July 5, 912

Specification of Letters intent Patented Feb. 4.1%13.

dcliai No. 707315.

specific". V iIlVeYitlOii ieiates to shall grinding machine with annular grooved dishs, wherein the baiis p gap in one grin-ding disk out of the groi, sinixed and thereupon led to the grooves invention has for its objeci to leiul 111s nnt of the grinding grooves, to the hails and in iced them again into or groov is While avoidii' I the disadvane of the Emmi-n arrangements in that the nlis are compelled to through closed i long roiling planes or surrctrnding ieieraiiy from the grinn- "Consequently" he invent-ion consists in passing iho fonlli out of the grinding groov :s on to two aosed undivided guiding members, which cro sing over each other in the form of are directed toward the middle of the gap in the grinding disk and terminate over a iower undivided guiding member. on which they guide the balls in two oppositely direcied streams and on which :he hails roil again the grii'iding grooves. The effect in be atiziined thereby is that the energy with which the balls leave the grinding grooves, is retained by the halls far possible in that the path up to their reentrance is only a short one cor responding to the extent of the gap in the grinding disk and the balls on this path have no resistances to overcome when passing through inlet and outlet channels but roll freely on the guiding members and fall through the mixing chamber. so that when the balls renterthe grinding grooves, they possess :ipproximnteiy that speed, which corresponds to the speed of the grind inn: disks. Consequently, special means for attaining an additional speed of the out going bails before reentering the grinding giwioves are superfluous. The same advanas with the machines working with artificial additional speed is however at. mined in that the speed of the grinding isirs is considsrabiy increased and the duration the uctnai grinding process for charge of miis is correspondingly dessed an it the balis is imi if these machines 1 more factory. it 1 moreover l t 142 aforesaid onus sion of the positive ciinnnei system, which is subjected to rapid Wear and tear and iherefore requires :i frequent expensive renewal, and also the possioiiity of using die grind 112' wi iout any nlterntion for i of different. diamciers Within certain 1 its, iii insinnce, for the sizes ch, wnich connection with Hi h iiositive guiding of the h i s not no sibie for ihe purpose of mixing, because in i inuciiines, in admis ion and discharge nhnnneis must. g esponi'l exactly wi l! the dinn-eiers of LiidiiillS.

The invention shown in the drawing iii-3 sppiied to 0. ball grinding machine with vertically disposed disks.

Figure 1 is horizontei section through "the grinding disks sat the gzip'nnd Fig. 2 is a vertical seciion according to of Fig. i.

The halls issuin uniformly from all grooves at the fail freely upon the two curveshaped grinding meinhcrsaand b,Which are relatively bent nnd cross over each other. The said uiding members extend approximately inili-wny the width ofthe gap. They guide the bails in. two oppositely directed streams on to the guiding member 0 underneath, on which the balls roll again to the grinding grooves and in such a manner that the balls coming from the outer grooves preferabiy pass into -tne inner grooms and those coming from the inner grooves pass into the outer grinding grooves. Flipincoming and outgoing of the balls take chines win pia'cdvithohtdoss of energy, so that a decrease of their speed and a jamming at the inletis prevented and the Working of the machine can remain continuous even when filling same with the largest possible numher ofi bells, After a large number of grinding-charges with balls of the same size, as, for example, g", is carried out and a Wear and tear of the grinding grooves has taken place to such an extent that ilie size of the grooves has become suitable for balls of the machine constructed according to the presentinventio can be used Without any alteration for bails then for 1 to receive the .is stationary members 3 17 and so forth to 11:", because the means used for feeding and leading away the balls are independent of the size of the balls.

I claim:

1. In a ball grinding machine, the combination of two cooperating grindin disks disposed in a vertical plane, one 0 which and the other movable, said grinding disks being formed with a plurality of annular grooves in their working faces and said stationary disk having a space to permit the discharge of the balls from said grooves, two juxtaposed curved guiding members located in the upper part of the space crossing each other and directed toward the median portion of the space balls passing out of the grooves, and an undivided guiding member located in the lower part of the space and adapted to receive the balls discharged from the said upper grinding members and to return said balls into said grooves.

2. In a ball grinding machine, the combination of cooperating grinders formed with a plurality of grooves in their working faces, a plurality of converging iding extending in a downwarf direc Copies of this patent may be obtained for five out: each, by addressing tion and arranged in a. space formed in one of said grinders, and an additional down \vardly extending guiding member adapted to mix the balls falling from said other guiding members and to re-conduct said balls into said grooves.

3. In a ball grinding machine, the combination of two vertically disposed co6pcrating grinders formed with a plurality of ball grooves in their working faces, a plurality of juxtaposed curved and substan tially short guiding plate members coil.- verging in a downward direction from said grooves toward the median portion of a space formed in one of said grinders, and an additional downwardly extending and substantially short guii'ling plate member which is arranged substantially inveirsely to said other guiding members and adapted to receive the balls therefrom and to re -con duct, said halls into said rooves.

In testimony whereof have allixed my signature in presence of two witnesses EVVALD HANUSJ Witnesses:

Ronnn'r MICHALSKT, HENRY Hasrsn.

the Commissioner of Patents-: 

